JPS5556763A - Picture process system - Google Patents

Picture process system

Info

Publication number
JPS5556763A
JPS5556763A JP13026378A JP13026378A JPS5556763A JP S5556763 A JPS5556763 A JP S5556763A JP 13026378 A JP13026378 A JP 13026378A JP 13026378 A JP13026378 A JP 13026378A JP S5556763 A JPS5556763 A JP S5556763A
Authority
JP
Japan
Prior art keywords
arithmetic circuit
picture
mean
standardization
threshold level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13026378A
Other languages
Japanese (ja)
Inventor
Koichi Ejiri
Morizumi Kurose
Mamoru Maeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13026378A priority Critical patent/JPS5556763A/en
Publication of JPS5556763A publication Critical patent/JPS5556763A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To ensure an effective elimination of the picture noise by calculating the mean density and the highest density of the plural number of picture elements in the designated region and using them as the necessary information only when they satisfy the fixed conditions to the fixed threshold level.
CONSTITUTION: Video signal Si is digitized through A/D converter 1 and then supplied to system Q for standardization as well as to system R for comparison and operation. System Q comprises arithmetic circuit 2, shift registers 3 and 5 plus standardization arithmetic circuit 4. Here the mean density of each line and the highest density of the preceding line are calculated and then stored in register 5 through standardization as the black and white when larger and smaller than the set threshold level respectively. On the other hand, system R comprises shift register 6, mean value arithmetic circuit 7, maximum value arithmetic circuit 8 and comparison control circuit 9 each, and carries out the necessary operation for system Q. As a result, the picture signal region is defined in case both the mean and maximum value are not smaller than the threshold level, and otherwise the region where no picture signal exists is defined to be turned into O forcedly and thus to extract the picture signal. In such way, the picture noise can be prevented without lowering the resolution.
COPYRIGHT: (C)1980,JPO&Japio
JP13026378A 1978-10-23 1978-10-23 Picture process system Pending JPS5556763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13026378A JPS5556763A (en) 1978-10-23 1978-10-23 Picture process system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13026378A JPS5556763A (en) 1978-10-23 1978-10-23 Picture process system

Publications (1)

Publication Number Publication Date
JPS5556763A true JPS5556763A (en) 1980-04-25

Family

ID=15030083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13026378A Pending JPS5556763A (en) 1978-10-23 1978-10-23 Picture process system

Country Status (1)

Country Link
JP (1) JPS5556763A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589034A (en) * 1980-12-05 1986-05-13 Canon Kabushiki Kaisha Image processing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589034A (en) * 1980-12-05 1986-05-13 Canon Kabushiki Kaisha Image processing apparatus

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